The following data was developed in a Hall action rifle,
with a Hart varmint weight barrel of 26 inches. We originally meant to have this
barrel installed on another action that we had used for the 7 x 57 Ackley, We
had to change our minds and use another action, as that one is being used for
another project we are working on. Both actions are identical, though.

We ran into a slight problem when we came to resize the
brass after it was fire formed. We discovered that someone had borrowed our 280
Ackley die set, and he was out of the country. We had to use the 7x57 Ackley die
to partially size the cases, and as the 7x57 die is not long enough to deprime
the cases, we had to add another operation to our usual schedule, and that is by
decapping the cases by using a Wilson decapping set.

We used Remington brass and the Federal 210M throughout all
our tests. All bullets were molly coated, and all groups are 5 shots at 100
yards. Velocity is choronographed at 10 feet ahead of the barrel, as per our
usual practice.